You can remove the drywall that was underwater and any floor covering if it's not tile, spray everything with 10% bleach solution, then button it all back up. Obviously waiting for everything to dry out and maybe a second application of bleach just to be sure. It's a pain in the butt to be sure, but not impossible. Also, a lot of homes in Florida are concrete block and stucco, so the structure is not compromised.
If you can dry it out fast and completely, mold becomes less of an issue. Sitting in a damp environment for weeks or months is where you can really get a mold problem. You would have a bigger mold problem in a house that didn't have AC for a few months, than you would a house that was flooded for 2 days, but was dried out within a few days afterwards. As an example, all the abandoned homes as a result of the housing crisis circa 2008-2011 needed to be gutted and rebuilt on the inside from mold damage.